36 



E 



POLYPODIACEAE. 1. Lindsaya. 



F. Sori and indusia more or less rounded. 



Indusium orbicular, attached to the leaf by 



a short central stalk Polystichum 10. 



Indusium reniform, attached laterally to the 



leaf Dryopteris 1 1. 



, Indusium absent ; sori linear. 



Sori covering most of the veins Gymnogramme 12. 



Sori laterally attached to the veins Pleurosortjs 13. 



1. LINDSAYA, Dryand. 

 (After John Lindsay, a surgeon in Jamaica.) 



1. L. linearis, Swartz. A small fern ; rhachis of 

 leaves wiry, shining, dark reddish-brown ; leaves simply 

 pinnate ; pinnae small, obliquely fan-shaped, distant, 

 with forked veins ; sori in a continuous line along the 

 outer margin of the pinna, with a broad marginal 

 indusium splitting down the middle and presenting a 

 cup-like appearance. 



Moist parts of the State ; usually in peaty soil. 



Fig. 3. — Lindsaya linearis. 



2. ADIANTUM, L. 



(Greek adiantoa, dry ; the leaves remain dry when 

 dipped into water.) 



1. A. aethiopicum, L. Maidenhair. Leaves rather 

 large, 2-3-pinnate ; petiole and rhachis dark, shining , 

 wiry ; pinnules (or ultimate segments) on short capillary 

 petiolules, suborbicular, thin, with forked veins ; sori 

 distinct in the sinus of the crenatures of the pinnule, 

 covered by the marginal reniform indusium. 



Mount Lofty Ranges and moist parts of the State. 



Fig. 4. — Adiantum aethiopicum. 



3. CHEILANTHES, Swartz. 



(Greek kheilos, a lip ; anthos, flower ; alluding to the lip-like indusi.um) 



Sori globular or finally confluent, forming an interrupted marginal line, partly covered 



by recurved indusium which is a continuation of the margin of the sessile pinnules ; petiole 



and leaf -rhachis dark glossy-brown ; veins forked-from a central nerve, bearing the 



marginal sori at their ends. 



Leaves 3-pinnatisect in lower part ; indusium interrupted Ch. tenuifolia 1. 

 Leaves 2-pinnate ; indusium continuous Ch. Clelandii 2. 



1. Ch. tenuifolia, Swartz. Leaves lanceolate in 

 outline, imperfectly tripinnatisect in the lower part, 

 the secondary segments lanceolate, pinnatifid to 

 pinnatisect, rather thin ; petiole glabrous or some- 

 what scaly ; sori and indusium interrupted in the 

 sinus of the lobes of the pinnules. 



All over the State. 



2. Ch. Clelandii, F. v. M. et Tate. Leaves 

 bipinnate, the segments broadly linear, minutely 

 crenulate-serrate ; rhachis beset with very short 

 somewhat glandular hairs ; indusium broad and 

 continuous along the margin of the segments, sori 

 minute, each separately lodged in a sinus of the 

 serrature ; " indusium of a Pteris." 



Caroona Hill, Gawler Ranges. There is no speci- 

 men in the Tate Herbarium, and I merely con- 

 dense the original discription, published in 1887. 



Fig. 5— Cheilanthes tenuifolia. 



